Firm Open Cell Natural Sponge Foam Sheet - 1/2" Thick x 36" Wide x 36" Long
Foam Ninja Polyethylene Foam Sheet 12 x 12 x 1/2 Inch Thick - 4 Pack Black Charcoal - Custom Foam Inserts High Density Closed Cell PE Case Packaging Shipping: Amazon.com: Industrial & Scientific
Elmer's Black on Black Foamboard, 1/2" x 20" x 30" - Sam Flax Atlanta